'''
False, None, True, __peg_parser__, and, as, assert, async, await, break, 
class, continue, def, del, elif, else, except, finally, for, from, global,
 if, import, in, is, lambda, nonlocal, not, or, pass, raise, return, try, 
 while, with, yield
'''

true='真'

True='我是真' #True是python中的保留字，不能做为变量名称